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File Edit View History Bookmarks People Window Help MasterngPhysics x @ A 100F Capac. × GTwo Large Condo, × G Two positive chia, x uPractice northes × MasteringPthysics: CH 28 Hw Secure https: assignmentProblemD-87358363 Problem 28.35-Enhanced-with Feodback Problem 28.35- Enhanced-with Feedback You may want to review(LD pages 785-787 ca Part A take to reduce the capacitors charge to 10.0pC? A 200 uP capecior inialy charged to 200 jC is decharged through a 1. Express your answer with the apprepriate units. 0 k2 resisior. How long does Value Units erovide Feedback 0 5 7

Explanation / Answer

given

C = 20 uF

Qo = 20 uC

Q = 10 uC

R = 1.3 k Ohm

R = 1300 Ohm

using equation

Q = Qo e- t/RC  

10 X 10-6 = 20 X 10-6 X e-t/ 1300 X 20 X 10-6

1 = 2 X e-t/ 1300 X 20 X 10-6  

0.5 = e-t X 38.461   

- 38.461 X t = ln ( 0.5 )

t = ln ( 0.5 ) / (- 38.461)

t = 0.018022 sec

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